2NF Storage Anomalies
Insertion: Cannot enter the fact that a particular drug has a particular side effect unless it is given to a patient.
Deletion: If John White receives some other drug because of the penicillin rash, and a new drug and side effect are entered, we lose the information that penicillin can cause a rash
Update: If drug side effects change (a new formula) we have to update multiple occurrences of side effects.